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Old 5th December 2003, 09:31 PM   #1
Tuukka is offline Tuukka  Finland
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Default tesla loudspeakers

i acquired a pair of old speakers from a friend of mine. i tried researching these speakers but could not find anything about them. hopefully someone here might know.

brand and model number are Tesla ARO-666. it's an 8" speaker with a blue frame and a black plastic cover over the magnet. very vintage: thin paper cone, accordion surround, no real dust cap, instead there is a small mesh. apparently they came out of an old record player.

i built a roughly 25liter sealed enclosure for them and they sound very detailed and full as they are just running fullrange with no eq or xo. impressive for a pair of speakers that sat hanging off a shelf, in a free-air baffle, in a dusty garage on a farm for at least a decade, with the sun constantly beating on their back through the window.

anyway, just wanted to see if anyone on the forum has heard of these drivers or even the brand.
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Old 8th June 2004, 11:00 AM   #2
deiksac is offline deiksac  Czech Republic
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this is an obsolete model made by tesla (now tvm acoustics - www.tvm.cz) in 70s, i was trying to find something nore specific about it but their data is not very accurate
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Old 8th June 2004, 11:03 AM   #3
deiksac is offline deiksac  Czech Republic
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could be some 5 watt, sensitivity somewhere near 86-87 dB
its successor was ARN (i think, am not sure) 6604(8) with some twenty watts, better magent but more or less same cone
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Old 14th June 2004, 04:54 PM   #4
deiksac is offline deiksac  Czech Republic
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if you would like me to find something more specific about them, please ask
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Old 6th July 2004, 03:15 PM   #5
Bose(o) is offline Bose(o)  Canada
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I remembered this thread a while ago and after cracking open a pair of Toshibas that my friend had given me, I just had to post. I have the exact same speakers that you are using right now. I'm going to measure their T/S specs in about 30 minutes or so. If you want efficiency and such numbers, tell me how to measure them and I will.
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Old 6th July 2004, 03:22 PM   #6
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Quote:
If you want efficiency and such numbers, tell me how to measure them and I will.
You can CALCULATE efficiency from the TSPs.


Regards

Charles
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Old 6th July 2004, 03:30 PM   #7
Bose(o) is offline Bose(o)  Canada
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oh yeah...that's right! My bad.
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Old 6th July 2004, 05:45 PM   #8
Bose(o) is offline Bose(o)  Canada
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Tesla ARO 666 T/S parameters:
Qts:0.81
Vas:17.3L
Fs:93Hz.
Re:7.7ohm
Le: ?
Xmax: ?
Qms: 4.79
Qes: 0.98
Pe: 5W (as per back of magnet)
Sd: 268.66cm^2
SPL: 74dB.@1W, 1m. (seems a little low.)
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Old 31st July 2004, 06:45 AM   #9
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Originally posted by Bose(o)
SPL: 74dB.@1W, 1m. (seems a little low.)
It certainly does... i've had a number of these, and they were all closer to the 86-87 dB figure mentioned earlier.

dave
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Old 31st July 2004, 06:59 PM   #10
Bose(o) is offline Bose(o)  Canada
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Planet10,

Where did you enlist your Tesla speakers for use? I was thinking of using the C-channel on my Sansui for the other sections of the basement and also making use of Open Baffles.
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